Bicycle-lock



(No Model.)

- I. W. NEWMAN.

BICYCLE LOOK.

I No. 598,326. Patented Feb. 1, 1898.

Nrrnn i STATES PATENT Ornron.

ISAAC NEWMAN, OF CLEVELAND, OHIO.

BICYCLE-LOCK.

SPECIFICATION forming part of Letters Patent No. 598,326, dated February 1, 1898.

Application filed June 18, 1897.

T0 aZZ whom, it may concern:

Be it known that I, ISAAC W. NEWMAN, a citizen of the United States, residing at Oleveland,in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Bicycle-Locks, of which the following, with the accompanying drawings, is a specification.

This invention relates to certain new and useful improvements in bicycle-locks.

The object of the invention is to provide a lock designed to be secured upon the frame of the bicycle in such position that its locking-bolt may be projected between the spokes of the sprocket-wheel, so as to prevent the latter turning.

The invention consists in the novel features of construction and in the various combinations of the parts, all as more fully hereinafter described, and pointed out in the claim.

In the accompanying drawings, which form a part of this specification, Figure 1 is a side elevation showing a portion of a bicycle-frame, the pedal-sprocket, and my improved lock in place. Fig. 2 is a top plan of same. Fig. 3 is an enlarged perspective of the lock detached. Fig. at is a central longitudinal section through the lock, the parts being in their unlocked positions. Fig. 5 is a similar view locked. Fig. 6 is an end elevation with the key removed. Fig. 7 is a cross-section on the line 03 0c of Fig. 1. Fig. 8 is a perspective view of the key.

A represents a suitable cylinder, open at one end to receive the plunger-cylinder B, which is adapted to freely slide therein.

0 represents a cross-headadapted to slidingly engage the plunger-cylinder B, and it is provided with a rod D, which passes through the inner head a of the plunger-cylinder B and is rigidly secured in any convenient manner to the head of the cylinder A.

E is a coil-spring around the rod D, between the head a of the plunger-cylinder and the cross-head O.

In the outer end of the plunger-cylinder B is rigidly secured a casting F, preferably of aluminium. Near the inner end of this casting there is formed a transverse recess 5 to receive the locking bolt or tumbler B, and H is a spring, one end of which is rigidly secured to the casting F, its free end resting Serial No. 64.1,258. (No model.)

upon the head of such tumbler G. Through the longitudinal center of the casting F is formed a keyhole c to receive the key J, and a keyway d is formed in the tumbler G. The outer end of the key is provided with a head K.

In one side and in the longitudinal direction of the cylinder A is formed a depression 6, which extends to Within a short distance of its open end and terminates in a shoulder f. The inner end of the plunger-cylinder B is similarly formed, so as to engage or register with such depression, as is clearly shown .in Figs. 4: and 5, and the outer end of such cylinder B is provided with a lip L.

The device is designed to be secured by clips or other suitable and convenient means to the lower bars M of a bicycle-frame in any such manner as will admit of the projecting of the plunger-cylinder between the spokes of thespro'cket-wheel N, as hereinafter described.

The parts being constructed and arranged substantially as herein set forth the operation is as follows: When it is desired to lock the wheel, the rider by means of the lip L draws the plunger-cylinder outwardly with its free end projecting between the spokes of the sprocket-wheel and until the spring H forces the tumbler outwardly to engage with the stop or shoulder f of the cylinder A, such action compressing the spring E, as shown in Figs. 2 and 5. He now Withdraws the key and can leave his wheel, confident that no one can run it away. By inserting the key and turning it until its Ward engages with the tumbler G and raises it from its engagement with the stop of shoulder f the spring E exerts its force and retracts the plunger-cylinder Within the cylinder A, as shown in Fig. 4, and when the parts are in this position the key cannot be withdrawn.

While I have shown but one tumbler G, it is evident that two or more may be employed without departing from the spirit of my invention, and I do not desire to confine myself to the location of the look upon the bicycle, as it may be placed on top of the bars M or be adapted to engage with either of the wheels.

What I claim as my invention is- 1 A bicycle-lock consisting of an outer cylinder A, having the internal stop f, a plungercylinder B, slidingly engaging said outer cyl- In testimony whereof I affix my signature, in presence of two Witnesses, this 26th day of 10 May, 1897.

WVitnesses:

H. S. SPRAGUE, H. P. BAILEY.

I. W. NEWMAN. 

